The systematic uncertainties of the cross section can be classified into reconstruction related and general contributions. The reconstruction related contributions are mode-specific and mainly originate from tracking, PID, reconstruction of intermediate states and total BRs. The uncertainties of \(\Delta E\)  and \(M_{\textrm {BC}}\)  requirements are negligible after correcting for the difference in resolution between simulated and real data samples. The uncertainties from tracking and PID of charged particles are investigated using control samples from \(e^{+}e^{-}~\rightarrow ~\pi ^{+}\pi ^{-}\pi ^{+}\pi ^{-}\) , \(K^{+}K^{-}\pi ^{+}\pi ^{-}\)  and \(p\bar{p}\pi ^{+}\pi ^{-}\)  collected at \(\sqrt{s}> 4.0~\mathrm {GeV}\)  [1]}. The uncertainties are obtained after weighting according to the momenta of the corresponding final states. Reconstruction uncertainties of \(K_{S}^{0}\) , \(\Lambda \)  and \(\pi ^{0}\)  have been found to be 1.2%, 2.5% and 1.0% [2]}. Statistical uncertainties of detection efficiencies are considered as systematic uncertainties. The dependence of the reconstruction efficiency on the MC model for the ten decay modes also gives a small contribution to the systematic uncertainty [2]}. Uncertainties originating from the total BRs of the tagged modes are quoted from Refs. [2]}, [5]}. A summary of the reconstruction related systematic uncertainties are given in Table REF . The total uncertainty at each energy has been calculated assuming that the values given at \(\sqrt{s}\)  = \( 4599.5 \)  \(\mathrm {MeV}\)  are valid at all CM energies.
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